Brake master cylinder

[Bernie Benz]

So, just go do it! Talk won’t do it.

On Dec 1, 2011, at 6:14 AM, Jay Kempf wrote:

> Depends on what your tolerance is for cheap chinese rebuilds.  
> Anywhere from $100-150 for rebuilds and $300-$500 for supposed new  
> original parts.
>
> Seals are basically free and the only thing that ever goes bad. I  
> rebuild stuff all the time that supposedly you can't rebuild. I  
> trust my own work more than rebuilders. I rebuilt every hydrualic  
> unit and all of the CIS fuel injection stuff in my 928. The fuel  
> distributor was selling for something like $1100 new. I rebuilt it  
> for a handful of free orings from an autoparts store near where I  
> live. Took an hour of measuring.
>
>
>
> jfk
>
>
> -------------------------
> Jay Kempf
> jkempf at madriver.com
> 802 272 5868
>
>
>
> From: PeterBergin at aol.com [mailto:PeterBergin at aol.com]
> Sent: Thursday, December 01, 2011 9:09 AM
> To: jkempf at madriver.com; auditony at gmail.com
> Cc: b.benz at charter.net; 200q20v at audifans.com
> Subject: Re: Brake master cylinder
>
> Hate to ask, but how much is a new one.  I bought one from a local  
> auto parts store 12 years ago for an old 5000 avant that preceded  
> my 200 which preceded my S6.
>
> I was only $75
>
> Pete
>
> In a message dated 12/1/2011 8:05:44 A.M. Central Standard Time,  
> jkempf at madriver.com writes:
> That has not been my experience with 20 year old seals. They turn  
> to hard plastic and stop working like a seal eventually. There are  
> a few Dorman part numbers for kits for different bore diameters for  
> VWs of the same vintage. I just need a MC off the car. For me  
> sourcing seals is not a problem. I have been in the trenches in  
> engineering for decades so I know how to measure and find the right  
> seal even if I don't have a part number. So back to anyone got a  
> dead one they would like to donate to the experiment? Boils down to  
> two lip seals normally in Nitrile Rubber for DOT 3/4.
>
>
>
> jfk
>
>
> -------------------------
> Jay Kempf
> jkempf at madriver.com
> 802 272 5868
>
>
>
> From: Tony Hoffman [mailto:auditony at gmail.com]
> Sent: Thursday, December 01, 2011 8:25 AM
> To: jkempf at madriver.com
> Cc: PeterBergin at aol.com; b.benz at charter.net; 200q20v at audifans.com
> Subject: Re: Brake master cylinder
>
> Jay,
>
> I'm one that agrees with Bernie on this. Take it apart and clean  
> everything, inspect closely. If the rubber is not torn, no reason  
> to replace it. It will seal well, not intermittently. If you can  
> get a rebuild kit, by all means replace everything if you wish.  
> However, they are not available for any of these older Audi's that  
> I'm aware of, and therefore a real PITA to source each little  
> piece. So, I jsut dissassemble, clean out all the gunk (which is  
> what is giving you problems IME) and reassemble.
>
> Tony
>
>
>
> Jay, DFWAB!
> Your MC is probably OK if the pedal does not go to the floor, however
> slowly.
> And one does not need rebuild kits for MC or calipers unless a boot  
> is torn
> and needs replacement.
> Just clean the parts well and reassemble.